Connect to Outlook Anywhere- Behind Web Proxy

We have OWA and RPC over HTTPS setup on our Exchange 2003 server, and both are working perfectly.

Some of our users are working at client sites and must connect to the internet through the client's web proxy. OWA uses the proxy authentication credentials that are saved in IE and connects without any problem. Outlook Anywhere does not use the saved credentials and will not connect.

We examined the HTTP traffic using Fiddler and found that the proxy authentication header is blank for Outlook Anywhere requests, but we can use Fiddler to inject the credentials and Outlook Anywhere connects.

Is there a way to configure this in Outlook 2007 so that we do not have to use this tool?? I have been through every setting I can find, and don't see a way to do it.

Sounds like more of an issue with the proxy that you are connect through as Rpc/https uses basic or ntlm credentials when connecting, if that is not being passed then you will have connections problems.

Well the problem is that I don't see a way to tell Outlook to pass the web proxy credentials so that we can even get out of the client's network. We can use a tool called Fiddler to insert the web proxy credentials into the HTTP request, and the web proxy then allows the traffic out to the internet and Outlook Anywhere can connect to our Exchange server. I was just curious whether there was a way to configure this in Outlook so that our users do not have to use this 3rd party tool every time they connect, but I am starting to think the answer is "no."

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